Bop is a lively style of jazz music that developed in the 1940s, known for its fast tempo, complex melodies, and creative improvisation. Musicians like Charlie Parker and Dizzy Gillespie pioneered this energetic sound, which featured rapid notes and unexpected rhythms that challenged both players and listeners. Instead of big bands playing for dancers, bop was performed by small groups in clubs, with musicians taking turns showing off their skills through inventive solos.

The word also means to hit something lightly or playfully, like when you bop someone gently on the arm with a rolled-up newspaper or bop a balloon to keep it in the air. It's a soft, bouncing kind of strike, not meant to hurt.

People today use bop as slang for any catchy, upbeat song that makes you want to move. When someone says “this song is a bop,” they mean it has an infectious rhythm and energy. You might hear someone say a new track is “a real bop” or that they're “bopping along” to their favorite music, moving their head or shoulders to the beat without really thinking about it.